[TowerTalk] Lightning Ground Clamp or Bracket

[Bud Trench]

I have an existing Rohn 45G 80' tower with a mast extending about 15 above
it and I would like to beef up the lightning protection.  

I plan to put in a total of 12 ground rods (5/8" x 8'), in three radial
legs, spaced 120 degrees apart.  Each leg will have 4 ground rods, with a
distance of 16' between each ground rod.  I will use AWG 1/0 stranded copper
on each leg, with Caldwell welds.

I need help with identifying a way to connect each ground radial leg to the
tower.  Any ideas or recommendations?

73 Bud AA3B